<template>
  <!--中间面板-->
  <div class="center-board">
    <div class="action-bar">
      <el-button icon="el-icon-view" type="text" @click="preview">
        预览
      </el-button>
      <el-button icon="el-icon-view" type="text" @click="view">
        查看
      </el-button>
      <el-button icon="el-icon-tickets" type="text" @click="viewJSON">
        JSON
      </el-button>
      <el-button icon="el-icon-s-tools" type="text" @click="setting">
        设置
      </el-button>
      <el-button
        class="delete-btn"
        icon="el-icon-delete-solid"
        type="text"
        @click="clear"
      >
        清空
      </el-button>
      <el-button icon="el-icon-question" type="text" @click="help">
        帮助
      </el-button>
    </div>
    <el-scrollbar class="center-scrollbar">
      <el-row class="center-board-row" :gutter="formConf.gutter">
        <el-form
          :size="formConf.size"
          :label-position="formConf.labelPosition"
          :disabled="formConf.disabled"
          :label-width="formConf.labelWidth + 'px'"
          class="design-form"
        >
          <draggable
            class="drawing-board center-board-row"
            :list="list"
            :animation="100"
            group="componentsGroup"
          >
            <template v-for="element in list">
              <el-row :gutter="element.gutter" class="drawing-item">
                <design-item
                  :model="element"
                  :activeItem="activeItem"
                  @rowItemRollBack="handlerRollBack"
                  @onActiveItemChange="handlerActiveItemChange"
                  @copyItem="handlerItemCopy"
                  @deleteItem="handlerItemDelete"
                />
              </el-row>
            </template>
          </draggable>
          <div v-show="infoShow" class="empty-info">
            <el-empty description="从左侧拖拽添加控件"></el-empty>
          </div>
        </el-form>
      </el-row>
    </el-scrollbar>
    <config-panel :activeItem="activeItem" :itemList="list" />
    <!-- 设计器配置弹出框 -->
    <el-dialog
      :visible.sync="formConfVisible"
      width="50%"
      top="30px"
      :center="true"
    >
      <el-tabs v-model="activeName">
        <el-tab-pane label="表单配置" name="formConf">
          <el-form ref="formConf" :model="formConf" label-width="100px">
            <el-form-item label="表单名">
              <el-input class="input" v-model="formConf.formRef"></el-input>
            </el-form-item>
            <el-form-item label="表单模型">
              <el-input class="input" v-model="formConf.formModel"></el-input>
            </el-form-item>
            <el-form-item label="校验模型">
              <el-input class="input" v-model="formConf.formRules"></el-input>
            </el-form-item>
            <el-form-item label="表单尺寸">
              <el-radio-group v-model="formConf.size">
                <el-radio-button label="medium">中等</el-radio-button>
                <el-radio-button label="small">较小</el-radio-button>
                <el-radio-button label="mini">迷你</el-radio-button>
              </el-radio-group>
            </el-form-item>
            <el-form-item label="标签对齐">
              <el-radio-group v-model="formConf.labelPosition">
                <el-radio-button label="right">右对齐</el-radio-button>
                <el-radio-button label="left">左对齐</el-radio-button>
                <el-radio-button label="top">顶部对齐</el-radio-button>
              </el-radio-group>
            </el-form-item>
            <el-form-item label="标签宽度">
              <el-input-number
                v-model="formConf.labelWidth"
                :min="60"
                :max="140"
              ></el-input-number>
            </el-form-item>
            <el-form-item label="栅格间隔">
              <el-input-number
                v-model="formConf.gutter"
                :min="0"
                :max="30"
              ></el-input-number>
            </el-form-item>
            <el-form-item label="动态表格支持组件高亮显示">
              <el-switch v-model="formConfig.dynamicTableAllowed"></el-switch>
            </el-form-item>
            <el-form-item label="禁用表单">
              <el-switch v-model="formConf.disabled"></el-switch>
            </el-form-item>
          </el-form>
        </el-tab-pane>
        <!-- <el-tab-pane label="提交前" name="fourth">开发中...</el-tab-pane> -->
      </el-tabs>
      <span slot="footer" class="dialog-footer">
        <el-button type="primary" @click="handlerSaveFormConf">确 定</el-button>
      </span>
    </el-dialog>
    <el-dialog :visible.sync="previewVisible" width="70%" title="预览">
      <preview
        :itemList="itemList"
        :formConf="formConf"
        v-if="previewVisible"
      />
    </el-dialog>
    <el-dialog
      :visible.sync="JSONVisible"
      width="70%"
      title="JSON"
      top="8vh"
      center
      :close-on-click-modal="false"
    >
      <div class="codemirror-box">
        <codemirror
          v-model="viewCode"
          :options="options"
          :style="{ height: '100%' }"
        />
      </div>
      <span slot="footer" class="dialog-footer">
        <el-button type="primary" @click="handlerSetJson()">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>
<script>
import draggable from "vuedraggable";
import configPanel from "./configPanel";
import designItem from "./designItem";
import { getSimpleId } from "./utils/IdGenerate";
import { isLayout, isTable, inTable, jsonClone } from "./utils/index";
import formConf from "./custom/formConf";
import preview from "./preview";
import { codemirror } from "vue-codemirror";
// 核心样式
import "codemirror/lib/codemirror.css";
// 引入主题后还需要在 options 中指定主题才会生效
import "codemirror/theme/dracula.css";
import "codemirror/mode/javascript/javascript";

export default {
  name: "designer",
  components: {
    draggable,
    configPanel,
    designItem,
    preview,
    codemirror,
  },
  props: {
    list: {
      type: Array,
      default: [],
    },
    formConfig: {
      type: Object,
      default: {},
    },
  },
  provide() {
    return {
      getContext: this,
    };
  },
  data() {
    return {
      formConf: formConf,
      activeItem: {},
      lastActiveItem: {},
      formConfVisible: false,
      previewVisible: false,
      JSONVisible: false,
      itemList: [],
      activeName: "formConf",
      editorCode: "",
      viewCode: "",
      // 默认配置
      options: {
        height: "100%",
        tabSize: 2, // 缩进格式
        theme: "dracula", // 主题，对应主题库 JS 需要提前引入
        lineNumbers: true, // 显示行号
        line: true,
        styleActiveLine: true, // 高亮选中行
        hintOptions: {
          completeSingle: true, // 当匹配只有一项的时候是否自动补全
        },
      },
    };
  },
  mounted() {},
  methods: {
    changeFormConfig(formConfig) {
      this.formConf = formConfig;
    },
    preview() {
      const clone = JSON.parse(JSON.stringify(this.list));
      this.itemList = clone;
      this.previewVisible = true;
    },
    viewJSON() {
      this.viewCode = this.code;
      this.JSONVisible = true;
    },
    view() {
      localStorage.setItem("formValue", this.code);
      window.open("#/view");
    },
    setting() {
      this.formConfVisible = true;
    },
    clear() {
      this.$confirm("此操作将清空整个表单,是否继续?").then(() => {
        this.$emit("clear");
      });
    },
    help() {
      window.open("https://gitee.com/wurong19870715/formDesigner");
    },
    handlerActiveItemChange(obj) {
      this.lastActiveItem = this.activeItem;
      this.activeItem = obj;
    },
    handlerItemCopy(origin, parent) {
      if (isLayout(origin)) {
        //row
        const clone = jsonClone(origin);
        const uId = "row_" + getSimpleId();
        console.log(uId);
        clone.id = uId;
        clone._id = uId;
        clone.columns.map((column) => {
          let itemList = [];
          column.list.map((item) => {
            const cloneItem = jsonClone(item);
            const uId = "fd_" + getSimpleId();
            cloneItem.id = uId;
            cloneItem._id = uId;
            itemList.push(cloneItem);
          });
          column.list = [];
          column.list = itemList;
        });
        this.list.push(clone);
        this.handlerActiveItemChange(clone);
      } else if (isTable(origin)) {
        //表格布局
        const clone = jsonClone(origin);
        const uId = "table_" + getSimpleId();
        clone.id = uId;
        clone._id = uId;
        clone.layoutArray.map((tr) => {
          tr.map((td) => {
            let itemList = [];
            td.id = getSimpleId();
            td.columns.map((item, i) => {
              const cloneItem = jsonClone(item);
              const uId = "fd_" + getSimpleId();
              cloneItem.id = uId;
              cloneItem._id = uId;
              itemList.push(cloneItem);
            });
            td.columns = [];
            td.columns = itemList;
          });
        });
        this.list.push(clone);
        this.handlerActiveItemChange(clone);
      } else {
        //如果是普通组件，需要判断他是否再布局组件下。
        if (parent) {
          if (inTable(parent)) {
            //增加表格组件的支持
            if (parent.columns.some((item) => item.id === origin.id)) {
              const clone = jsonClone(origin);
              const uId = "fd_" + getSimpleId();
              clone.id = uId;
              clone._id = uId;
              parent.columns.push(clone);
              this.handlerActiveItemChange(clone);
            }
          } else {
            parent.columns.map((column) => {
              if (column.list.some((item) => item.id === origin.id)) {
                const clone = jsonClone(origin);
                const uId = "fd_" + getSimpleId();
                clone.id = uId;
                clone._id = uId;
                column.list.push(clone);
                this.handlerActiveItemChange(clone);
              }
            });
          }
        } else {
          const clone = jsonClone(origin);
          const uId = "fd_" + getSimpleId();
          clone.id = uId;
          clone._id = uId;
          this.list.push(clone);
          this.handlerActiveItemChange(clone);
        }
      }
    },
    handlerItemDelete(origin, parent) {
      if (isLayout(origin) || isTable(origin)) {
        //如果是布局组件,则直接删除
        const index = this.list.findIndex((item) => item.id === origin.id);
        this.list.splice(index, 1);
      } else {
        //如果不是布局组件，则先判断是不是再布局内部，如果不是，则直接删除就可以，如果是，则要在布局内部删除
        if (parent) {
          if (inTable(parent)) {
            //增加表格组件的支持
            const colIndex = parent.columns.findIndex(
              (item) => item.id === origin.id
            );
            if (colIndex > -1) {
              parent.columns.splice(colIndex, 1);
            }
          } else {
            parent.columns.map((column) => {
              const colIndex = column.list.findIndex(
                (item) => item.id === origin.id
              );
              if (colIndex > -1) {
                column.list.splice(colIndex, 1);
              }
            });
          }
        } else {
          const index = this.list.findIndex((item) => item.id === origin.id);
          this.list.splice(index, 1);
        }
      }
    },
    handlerSaveFormConf() {
      this.formConfVisible = false;
    },
    handlerRollBack(rowItem, oldIndex) {
      //还原
      this.list.splice(oldIndex, 0, rowItem);
    },
    handlerSetJson() {
      this.$emit("updateJSON", this.viewCode);
      this.JSONVisible = false;
    },
  },
  computed: {
    infoShow() {
      return this.list.length < 1;
    },
    code() {
      let json = {};
      json.config = this.formConf;
      json.list = this.list;
      return JSON.stringify(json, null, 4);
    },
  },
  watch: {
    activeItem(newValue, oldValue) {
      this.lastActiveItem = oldValue;
    },
  },
};
</script>
<style scoped>
.codemirror-box >>> .CodeMirror {
  height: 600px;
}
.el-rate {
  display: inline-block;
}
.center-scrollbar >>> .el-scrollbar__bar.is-horizontal {
  display: none;
}
.center-scrollbar >>> .el-scrollbar__wrap {
  overflow-x: hidden;
}
.empty-info >>> .el-empty__description p {
  color: #ccb1ea;
  font-size: 16px;
}
.drawing-board >>> .el-radio.is-bordered + .el-radio.is-bordered {
  margin-left: 0px;
}
.drawing-board >>> .el-checkbox.is-bordered + .el-checkbox.is-bordered {
  margin-left: 0px;
}
</style>
<style lang="scss">
@import "./style/designer.scss";
</style>
<style>
@import "./style/designer.css";
</style>
